As kernel split lock patch[1] merged into tip tree, kvm emulator needs to be fixed and vmx's #AC handler needs to be extended. Patch 1 fixes x86/emulator to emualte split lock access as write to avoid malicous guest[2] exploiting it to populate host kernel log. Patch 2 extends vmx's #AC handler that we can make old guestes (has split_lock buges) survive on certain cases. [1] https://lore.kernel.org/lkml/158031147976.396.8941798847364718785.tip-bot2@tip-bot2/ [2] https://lore.kernel.org/lkml/8c5b11c9-58df-38e7-a514-dc12d687b198@xxxxxxxxxx/ Xiaoyao Li (2): KVM: x86: Emulate split-lock access as a write KVM: VMX: Extend VMX's #AC handding arch/x86/include/asm/cpu.h | 13 ++++++++++++ arch/x86/kernel/cpu/intel.c | 18 ++++++++++------ arch/x86/kvm/vmx/vmx.c | 42 ++++++++++++++++++++++++++++++++++--- arch/x86/kvm/vmx/vmx.h | 3 +++ arch/x86/kvm/x86.c | 11 ++++++++++ 5 files changed, 78 insertions(+), 9 deletions(-) -- 2.23.0
